Production of sodium sulfite

Details Production of sodium sulfite Production of sodium sulfite

C - Chemistry, Metallurgy

01

D

23/105

C01D 5/14 (2006.01)

Patent

CA 1093786

ABSTRACT OF THE DISCLOSURE Anhydrous sodium sulfite is made by process involving introducing substantially anhydrous sodium carbonate concurrently with sulfur dioxide-containing gas into a saturated solution of sodium sulfite maintained at pH of between about 6.5 and about 7.6 at temperature above about 35°C. to form a slurry of anhydrous sodium sulfite crystals, and withdrawing the crystals from the slurry. The process is initiated using a concentrated sodium sulfite solution containing less than about 3 ppm of dissolved iron. iron.

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